Automatic door.



PATENTED. JULY 17, 1 906.'

D. SGHUYLER. AUTOMATIC DOOR.

APPLIUATION FILED AUG. e. 1905.

2 SHEETS-,SH T 1 sumaron. D. c.

PATNTED JULY 1'7, 1906. D. SOHUYLER.

AUTOMATIC DOOR. APPLI'OATION FILED AUG. s, 1905.

2 SHEETS-SHEET 2.

UNITED `STATES DANIEL SCHUYLER, OF SAN PATENT OFFICE.

DIEGO, CALIFORNIA, ASSIGNOR TO THE PERFECT SLIDING DOOR COMPANY, OF LOS ANGELES,

cALnoR- NIA, A CORPORATION OF CALIFORNIA.

AUTOMATIC DOOR.

Specification of Letters Patent.

Patented July 17, .19.06-v

To all whom it may con/cerro:

Be it known that I, DANIEL SCHUYLER, a citizen'of the UnitedStates, whose residence is San Diego, in the county of San Diego and State of California, temporarily residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented new and useful Improvements in Automatic Doors, of which the following is a specification.

This invention relates to improvements over the invention in automatic sliding-door openers patented to me April 9, 19017 by Letters Patent No. 671,637.

An object of this invention is to simplify and cheapen the construction and installation of the automatic door and to improve its operation.

Other features of the improvement are simplicity in adjustment andease of assembling and disassembling, also lightness of construction and ease of packing the hardware for the same in small space.

Further objects and advantages may be understood from the accompanying detailed description.

' The accompanying drawings illustrate the invention.

Figure 1 is a fragmental view of an automatic sliding door embodying this invention andshowing parts in position for opening the door. Fig. 2 is a fragmental plan showing the floor-plates and depression-pulleys. Fig. 3 is a fragmental sectional view showing the push-arm, the operating connection, and the retracting-spring and its bracket. Fig. 4 is a mid-section of one of the tread devices in place, showing the position of the parts when at rest. Dotted lines indicate tilted position of the same to give access for adjustment. Fig. 5 is a side elevation of said tread device in place with the parts in position for actuating the push-arm. Fig. 6 is an enlarged fragmental detail plan to illustrate the ilexible connections of pulleys and one of the tread devices. Fig. 7 is an enlarged side view of the tread device in lace and at rest. Fig. 8 is an end elevation o the tread device omitting the flexible connection. Fig. 9 is a view of the bottom of the tread device with flexible connection. Fig. 10 is a fragmental view of the retracting-spring, its swivel, and adjusting-bracket. Fig. 11 is a view of such bracket detached. Fig. 12 is a detail of the adjusting catch or fastener for the adjustable connection.

1 designates a door-closure g 2, the frame or casing therefor; 3, a pneumatic check device to receive the door and cause it to close gently; 4, a push-arm comprising a bent lever pivoted at 5 to the frame 2 by means of a slotted plate 6, which chambers the pusharm when in its normal position.

7 is a limb of the push-arm, and 8 a pin by which a flexible connection 9 is connected with said push-arm. 10 is a spring adjustably fastened to a bracket 11 and rovided at its lower end with a swivel 12, wliich is connected with the arm A7 by the pin 8 and flexible connection 9, which is `preferably a fiat chain.

13 14 designate two pulleys mounted below the ush-arm with appropriate relation to the oor 15 of the building in which the 'automatic door is installed.

The iiexible connection is preferably bifurcated, having two portions or sections 16 and 17, which are respectively led under the pulleys 13 and 14.

18 and 19 are two tread devices on opposite sides of depression-pulleys 13 and 14 and respectively connected with the branch flexible connections 16 and 17 and through the main flexible connection 9 with limb 7 of the pusharm, Awhich projects rearwardly from the back of the jamb c of the door-frame, said jamb being provided with a slot l), in which the main body of the push-arm is chambered when retracted.

The floor 15 is provided with holes 20 to receive the tread devices, and the chains or other flexible connections 16 17 are led to their respective tread devices through notches or grooves 21 below the surface of the floor. These notches may be in the upper face of subiiooring 22 or in the joists (not shown) in case there is no subflooring.

Sustaining-pulleys 23 are provided, one for each tread device, and each branch of the flexible connection is led over a pulley 23 and connected with the tread 24 of its tread device.

25 is an open frame having a shoulder or ledge 26 at its upper edge, and the pulley '23 is preferably carried by said frame 25, a forward extension 26 being provided at one end of the frame for that purpose. The tread 2.4

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is pivoted by a pivot 27 to the other end of the frame and is provided with a downward extension or portion 28 at the end opposite its pivot, which is adapted to be depressed below the top of the pulley 23. j

29 is a cross-bar forming a support on lthe tread for the connection 16 or 17, as the case may be, and 30 is a catch upon which the chain 16 or 17 will be caught for the purpose of securing the same to the tread.

31 32 designate an adjusting-screw and nut for the` catch 30 to give the required adjustment to the flexible connection. Preferably the tread is formed of a metal frame 33, on the top of which a tread-plate 34 will be fastened by screws 35.

36 is a block fastened to the plate 34 and adapted to stand somewhat above the level of the floor 15 to be trod upon by the person wishing to open the door.

37 designates stops fastened to a downward extension 38 Vof the frame 25 to prevent the tread-plate 34 from going down too far-when trod upon.

39 is a buffer-cushion upon a forward extension 40 of the pivoted metal frame 33 of the tread device. The tread-knob 36 may be fastened to the tread-plate 34 in any suitable way. It may be glued thereon, or for greater security it may be seated in the socket 41.

(See Fig. 4.) Theunder side of the tread-` plate and knob is preferably recessed, as shown yat 42 in Fig. 4, to accommodate the flexible connection.

The catch 30 is provided with a head 43, which projects at right angles to the direction of strain, and over this head a link ofthe chain 16 or 17 may be passed to secure the flexible connection. Preferably the open frame 25 is simply set into the hole 2O in the floor loosely, and in order to get access to the chain the rear end of the hame 25 may be tilted toward the door, as indicated in dotted lines in Fig. 4, thus allowing access to the under side of the tread for releasing, securing, and adjusting the chain 16 or 17.

The tip or head 43 extends sidewise from a stem 44 of the catch 30, so that to release the chain the same will simply be slid off the stem ,44 and then laterally 0H the tip. The arrangement shown affords a fastening that will not accidentally come undone and by which the chain can be fastened with minimum slack.

To install the device, the push-arm plate with its push-arm will be secured in the slot in the door-j amb, and the depression-pulleys will be mounted below the same to lead the flexible connections underneath the surface of the floor. Cords may be arranged in the grooves 21 before laying the top flooring 15,

thus enabling the workman to readily draw the chains 16 17 into place when desired. When the top flooring has been laid, the frames 25 of the tread devices will be applied in the tilted position shown in dotted lines in Fig.v 4, andthe chain will be caught upon the catch at the point the workman deems desirable, and then the tread device will be brought into the horizontal position shown in solid lines in said Fig. 4. If the push-arm then comes to rest in the appropriate manner and the connection is found to be of pro e'r length, so that the arm will immediate y respond when'the tread-plate is depressed, no further adjustment is required; but if the chain shall be too loose or too tight the tread device will be tilted up again and the chain shortened or lengthened, as required, by either hitching the catch in a different link if that much adjustment is required, or by turning the adjusting-screw.

The bracket 11 is desirably made of sheet metal bent` into angular form and provided with a central o ening 45 and a slit or o ening 46, leading flrJ The margins 47 of the slit 46 are reversely turned up and down, respectively, to conform to the spiral of the spring 10, so that the coils of said spiral spring may be screwed into the bracket and held thereby at different heights, thus increasing or decreasing the tension of the spring 10. The swivel 12, hooked into the flexible connection 9, allows the spiral spring 10 to be turned freely for this purpose. The bracket 11 is held in place by any suitable means, as by screw 48, passing through a hole 49 in the bracket.

The spiral spring 10 is reduced in diameter at the lower end, and the swivel 12 is provided with a plate 50, which rests on the lower coil 51 of the spring, the coil 52 next above having an inside diameter approximately the .same as the diameter of the plate 50, so that when the swivel 12 is inserted into the top of the spring 10 it will come to rest and be retained in central position at the bottom of the spring.

In practical operation either or both ofthe treads may be operated by pressing upon the knob 36, whereupon the push-arm 4 is moved outward to impel the door away from the jamb. When the pressure is removed from the treads, the arm returns to its position, and the door, which is preferably arranged to close by gravity, will return to closed position, being gently received and checked by the pneumatic check 3.

1. A push-arm, yielding means for holdin said arm retracted, a pulley beneath sai arm, a flexible connection connected with said arm to operate the same'against the force of said yielding means, and a tread deom the edge of the brac et.

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vice connected withsaid flexible connection ISO said pulleys respectively, a tread device on one side of said pulleys connected with one of said flexible connections to operate the pusharm against the force of said yielding means, and a tread-plate on the other side of said pulleys connected with the other ilexible connection to operate said push-arm against the force of said yielding means.

3. A push-arm comprising a bent lever pivoted at its bend, a spring above the pivot connected with one arm of the lever to normally hold the push-arm retracted, a flexible connection connected with said arm of the lever, a pulley around which such connection is led, and a tread device operatively connected with said connection to actuate said arm against the force of said spring.

4. An automatic door-comprising a closure arranged to normally close, a checking device free from said closure arranged to receive .the same and cause it to close gently, a pusharm in the path of the edge of the closure, yielding means for normally holding the same retracted rearwardly from the extended position of the check, a pulley below the pusharm, a flexible connection connected with the push-arm and fastened beneath the pulley, and a tread device connected with the connection and adapted tooperate the same for actuating the push-arm against the force of said yielding means.

5. An automatic door comprising a closure arranged to normally close, a checking device free from said closure arranged to receive the same and cause it to close gently, a pusharm in the path of the edge of the closure, yielding means for normally holding the same retracted rearwardly from the extended position of the checkin device, pulleys below the push-arm, a flexible connection connected with the push-arm and led beneath the pulley, a tread device at one side of the pulley connected with the flexible connection and adapted to operate the same for actuatingthepusharm against the force of said yielding means, another flexible connection connected with the push-arm and led under the other pulley, and a tread device on the other side of said pulleys connected with the last-mentioned flexible connection to operate the same to actuate the push-arm against the force of said yielding means.

6. The combination of a bent push-arm pivoted at the bend, a s ring fastened to one limb of said arm` to hold the arm normally retracted, a depression-pulley beneath said arm, a sustaining-pulley at one side of said depression-pulley, a pivoted tread device, and a flexible connection fastened to a limb of said arm and led under the depressionpulley and over the sustaining-pulley and connected to the tread device at a distance from the pivot thereof.

7. An automatic door, a pivoted tread device, a push-arm, a pulley, a flexible connection connected with the push-arm to operate the same and led therefrom to and over said pulley and connected with a portion of the tread which is adapted to be depressed below the level of said pulley.

8. Means for opening a door, a frame, a pulley mounted at one end of said frame, a tread device pivoted to the other end of said frame and provided with a portion which extends below the top of said pulley, and a ilexible connection connected with said dooropening means led over said pulley and connected with said portion of the tread device.

9. In an automatic door, a door-opener, a frame provided with a shoulder at its upper edge, a pulley mounted below said shoulder at one end of the frame, a tread device pivoted to the other end of the frame and provided with a portion adapted to move below the top of said pulley, and a flexible connection for operating the door-opener led over said pulley and connected with said portion of the tread device.

10. In an automatic door, a frame, a pulley on the frame, a pivoted tread, a buffer on the tread to engage the pulley, and a flexible connection led over the pulley and connected with the tread.

11. A push-arm, a tread, a flexible connection between the tread and push-arm, adjusting means for fastening the connection to the tread, said connection being connected with the push-arm, and adjustable resilient means for retracting the push-arm.

In testimony whereof l have hereunto set my hand, at Bridgeport, Connecticut, this 7th day of August, 1905.

DANIEL SCHUYLER. In presence of.

ELBE-RT O. HULL, RUTH RAYMOND.

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